Ventilator



0. E. CLOUD.

VENTILATORQ V APPLlCATION FILED SEPT. 29,1919.

1,346,633. Patented July 13, 1920. .717 1 75/ Z IN VEN TOR.

A TTORNE Y.

PATENT OFFICE.

UNITED STATES OSCAR'E. CLOUD, OF lHIGI-IITA, KANSAS.

VENTILATOR.

Patented July 13,1920.

Application filed September 2s, 1919. Serial No. 327,345.

I '0 all whom, c'tmay concern Be it known that I, OsoAn E. OLoUn, acitizen of the United States (rt-America, and resident of Wichita, inthe county oi Sedgwick and State of Kansas, have invented certain newand useful Improvements in Ventilators, of which the following is aspecification, reference being had to the accompanying sheet ofdrawings.

This invention relates to ventilators for the tops of air stacks, andbelongs to the type known as siphon ventilators.

The invention and improvement consists in the provision of a number ofverticalradial deflectors applied to the inner and outer faces of thehood, and to the novel. combinations and arrangements therewith of aconical deflector and other allied parts whereby an improved siphonageis produced and a free outflow of gases and air through the ventilatormaintained.

Referring now to the accompanying drawings:

Figure 1 is a side elevation of a ventilator constructed according tothe invention; Fig. 2 is a central vertical section of same; Fig. 3 is atop plan view of same; Fig. 4; is a detail view of material for onevertical-radial deflector; Fig. 5 shows a modified form of the hood inelevation.

The ventilator comprises for its principal parts, the body tube 1,(which forms an extension of the upper end of an air stack) the annularwind-guard 2, the cap 3, the conical deflector 4, and the frustoconicalhood 5.

The hood 5 is supported from the tube 1, and the wind-guard 2 issupported from the hood 5. The cap and deflector 3-4 are supported inthe ring 2 by means of brackets 6.

The hood 5 is held in concentric position by a series of pairs ofsheet-metal fins 7 and 8 which are vertically and radially disposed. Theinner fins, 7, have right-angled flanges 7' by which they are secured tothe body tube 1 by rivets 9, and have similar flanges by which they aresecured to the hood 5. The outer fins 8 are formed with flanges 8fastened to the hood with rivets 10. The outer fin of each pair is inthe same plane as the companion inner fin 7. These fins constituteair-deflectors, which have the function of directing horizontal windsupwardly and through the wind-guard 2. By reference to the drawings, itwill be noted that the conical cap 3 is sufliciently large at its baseto more than cover the eduction pipe 1 thereby preventing rain fromentering said pipe, the conical deflector l integrally depending fromthe cap 3 has slightly smaller than the base of said cap, the apex ofsaid deflector lhangs below the plane of the rim of the hood 5, said rimbeing flared as clearly seen in Fig. 2.

The wind-guard is secured to the upper ends of the outer fins 8 by smallbolts 12 instead of being riveted, so that the parts carried by thewind-guard may readily be removed for cleaning or other purposes.

The upper ends of each pair of fins'7S are cut obliquely, so as to meetthe upper rim of the body tube 1.

The lower edge 13 of each segment of the hood 5 is out upon an archedcurve, as

shown, instead of straight across as they might be (see Fig. 5). Thiscutting-away is a feature of improvement for this reason :-it causes andpermits a greater volume of moving air to enter the space between thehood and the body tube: this air willmainly be drawn upward, asindicated by darts on the drawing, and thus the total siphoning forceacting upon the air within the stack will be augmented. It will beespecially noted that the oblique cut given the upper portions of thefins 7 and 8 allow for a free circulation of air'above the top orificeofthe eduction pipe 1 and that the conical deflector 4 dropping downbelow the flared rim of the hood 5, that is within the orifice of saidhood, the said deflector cooperates with said flared rim and obliqueupper portions of the fins to turn the gases and the assisting aircurrents as indicated by the arrows without the eddying andobjectionable features now a condition that obtains in common practice.

In laying out a pair of the fins 7--8, a single piece is cut to theshape shown by Fig. 4, then the piece is divided along the centraldiagonal line.

In small sizes of ventilator, four verticalradial deflectors will beemployed; in large sizes, a larger number. Such modifications may beemployed as lie within the scope of the appended claim.

Having described my invention, what I claim and desire to secure byLetters Patent 1s tion pipe, upwardly tapering fins integral therewithand vertically radiating around a base but 60 A ventilator comprising atubular eduethe outside thereof; afrusto-conieal hood surrounding saidpipe and extending above theupper end thereof and having an upperoutwardly flared rim portion said hood be ing supported by outerinclined edge portions of said fins; downwardly tapering fins wlthoutsaid hood, rad1ating 1n the same a V VVitnesses eduetion pipe; aeoniealdefleetor, haying its base Within said cap and its apex dependingtherefromdownwardly to a point below the plane of the flared rim of saidhood and Within said hood orifice; the upper edges of said inner andouter fins extending 0bliquely from the upper edge of said eduotion pipeto the base of said Windguard; all sub stantially in theniannerdisclosed and for the purposes as specified. 1

EL CLOUD.

WV. E. VETHERGOT, N. D. WI B

